Ostrea gravitesta Yokoyama
| 1964. | Ostrea gravitesta Yokoyama Syntype Shikama, T. 1964 p. 128, pl. 41, fig. 22 |
| 1958. | Ostrea gravitesta Yokoyama Syntype Makiyama, J. 1958 pl. 57, fig. 1a-c |
| 1952. | Ostrea gravitesta Yokoyama Syntype Shikama, T. 1952 p. 150, pl. 37, fig. 4 |
| 1943. | Ostrea gravitesta Yokoyama Syntype Shikama, T. 1943 p. 233, pl. 37, fig. 4 |
| 1926. | Ostrea gravitesta Yokoyama, 1926 Syntype Yokoyama, M. 1926j p. 388, pl. 45, fig. 1a-c |
| Condition: | Missing |
| Taxonomy: | Mollusca: Bivalvia: Ostreidae: |
| Geologic Time: | Cenozoic: |
| Makiyama, J., 1958: Matajiro Yokoyama's Tertiary fossils from various localities in Japan. Part 2. Palaeontological Society of Japan, Special Papers, no. 4, pp. 1–6, pls. 25–57. (Reference No. 0368) |
| Shikama, T., 1943: A handbook of illustrated fossils from Japanese and their adjacent territories., pp. 1–279, pls. 1–46. Nippon Koubutu Syumi-no-kai, Kyoto. (in Japanese) (Reference No. 0616) |
| Shikama, T., 1952: A handbook of illustrated fossils from Japanese and their adjacent territories., pp. 1–376, pls. 1–57. Nippon Koubutu Syumi-no-kai, Kyoto. (in Japanese) (Reference No. 0617) |
| Shikama, T., 1964a: Index fossils of Japan., pp. 1–287, pls. 1–80. Asakura Shoten, Tokyo. (in Japanese) (Reference No. 0618) |
| Yokoyama, M., 1926j: Fossil Mollusca from the oil-fields of Akita. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 9, pp. 377–389, pls. 44–45. (Reference No. 0487) |
 |
| Ichikawa, T., 1988, no. 15, p. 175. |
| Ichikawa, T., 1983, no. 9, p. 58. |
| Ichikawa, T., 1988, no. 15, p. 156. |
| Ichikawa, T., 1988, no. 15, p. 146. |
| Ichikawa, T., 1983, no. 9, p. 342. |
